“I am what I am, and I will probably never change,” wrote Jack Warner, head of the Warner Bros. Studio for over 40 years and the 1958 recipient of the Irving G. Thalberg Memorial Award. On his nine-acre estate, which he built from 1926 to 1937, was a Neoclassical mansion designed by architect Roland E. Coate with interiors by William Haines and grounds by Florence Yoch.